Yamashita Rubber Kabushiki Kaisha

Honda Motor Co., Ltd.

Jun Saitoh

Kazutoshi Satori

Yukimitsu Minamibata

A partition member for dividing a fluid chamber into a main fluid chamber and a sub-fluid chamber is provided with an idle orifice passage of which the opening is opened and closed by a seating section provided on part of a diaphragm. A pushing member is provided to control the opening and closing operation. The seating member is formed thick of which the upper and lower surfaces are provided with depressions respectively. The seating member is also provided with a thin section of which the periphery is provided with a hemispheric protrusion and a seal of a substantially right triangle cross section. An elastic body section is also provided at the side surface with a lateral membrane section.

Fluid sealed antivibration device

A first connecting member is connected to a second connecting member by an elastic body member. A fluid chamber which is formed inside the first connecting member, the second connecting member and the elastic body member is divided into a main fluid chamber and a sub-fluid chamber by a partition member An idle orifice and a damping orifice communicate with both chambers. In a part of a side wall member which forms the main fluid chamber is formed a round hole which is covered by a part of the elastic body member to form a horizontally movable membrane A circular wall is integrally formed with the partition member to face the horizontal movable membrane at predetermined intervals. Resonance of the horizontal membrane generated as a result of fluctuations of internal pressure in the main fluid chamber is controlled by the circular wall

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Saitama, Japan

Jun Saitoh